The Waldspirale is the name of a residential building complex in Darmstadt, Germany built in the 1990s. The name translates into English as spiral forest, reflecting both the general plan of the building and the fact that it has a green roof. It was designed by Viennese artist Friedensreich Hundertwasser, built by the Bauverein Darmstadt company, and planned and implemented by the architect Heinz M. Springmann. The building was completed in 2000.
The Waldspirale apartment building is located in Darmstadt's Bürgerparkviertel. It contains 105 apartments, a parking garage, a kiosk as well as a café and a bar (the last two being located at the top of the spiral). The inner courtyard contains a playground for the children of the residents and a small artificial lake. Peculiarities of the U-shaped building are the unique facade, which does not follow a regular grid organization, and the windows, which appear as if they were "aus der Reihe tanzen," (dancing out of line)  everywhere different and appearing out of order, often with 'tree tenants' - trees growing out from the windows. The diagonal roof, planted with grass, shrubs, flowers and trees, rises like a ramp along the U-form. At its highest point, the building has 12 floors.